package foo;import java.util.Arrays;public class Main {        public static void insertionSort(int[] a, int len) {        int in, out;        int temp;        for (out=1;out<len;++out) {            temp = a[out];            in = out;            while (in>0&&a[in-1]>temp) {                a[in] = a[in-1];                --in;            }            a[in] = temp;        }    }        public static void main(String[] args) throws Exception {        int[] a = new int[]{3,2,1,5,4};        insertionSort(a, a.length);        System.out.println(Arrays.toString(a));    }}